Being that you are familiar with golf carts, if you could squeeze in two GC-2's, it would give you a lot more Ah and longevity. In our previous 5th wheel I added 2, then 4 of them and a small inverter that fed one reciprocal. I could run the TV, Dish receiver, and a small wine fridge. The truck's alternator kept them charged going down the road with the wine fridge running.
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2014 F150 4x4 Crew Cab Platinum 157" WB
Roadmaster Blackhawk 2, RVI2 Brake System